Their work has seen willows thinned out, 8000 native trees and grasses planted along the river, and whitebait spawning sites identified. They are also involved in the TANK project.
"I know restoration will take years, but I'm heartened by the big turnouts - a hundred plus people generally turn up to help on planting days," he said. "Many of them are rangatahi, young people".
Mr Hawaikirangi's contribution was recognised at last week's national 2017 River Story Awards, run by the Cawthron Foundation.
Although he did not win, the Hawke's Bay Regional Council compliance officer said he felt privileged to be recognised as one of three finalists, which meant he was able to "give a bit of air time" to the work they were doing.
"I was just pretty stoked to be a finalist and sit among the awesome group that were nominated for the awards."
With the project in its last year of funding, he hoped more recognition within the Hawke's Bay community would help with their work to improve the river.
Mr Hawaikirangi also works as the Treaty settlement group helping to restore Lake Tutira. He does hapu work in his spare time.
Cawthron Foundation chair Dr Morgan Williams said the River Awards were established to draw attention to the state of our rivers. The most improved rivers were determined by a panel of scientists using monitoring data from LAWA.
"But more importantly, to recognise where communities, councils, farmers and industry were achieving significant improvement in water quality in one or more of their local rivers.
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